The three and half billion year history of life on earth has seen five great mass extinction events, almost all of them driven by, or associated with, climate change. Today many biologists fear were are living in the shadow of a sixth great extinction where half of all plant, animal and bird species are thought to be at risk. So what might be done to protect and conserve bio-diversity?

Highlights of The Extinction crisis : Man the lifeboats presented by the Society for Conservation Biology, Taronga Zoo, Sydney. 9th February 2015